Metal-shaving machine.



G. DUNHAM.

METAL SHAVING MACHINE.

APPLIOATION FILED APR. 18, 1914.

Patented Jan. 12. 1915.

\ INVENTOR.

WITNESSES.-

THE NORRIS PETERS CO4, PHOTO-LITHOV. WASHING IC Nv D, C.

UNITED STATES PATENT orrr on.

GEORGE DUNHAM, OF UNION'VILLE, CONNECTICUT.

METAL-SHAVING MACHINE.

Application filed April 18, 1914. Serial ma a.

To all whom it may concern Be it known that I, GEORGE DUNHAM, a citizenof the United States, residing at Unionville, in the county of Hartfordand State of Connecticut, have invented a new and ImprovedlVletaLShaving Machine, of which the following is a specification.

My invention relates more especially to the class of metal shavingmachines that are employed for shaving nuts and like articles, and anobject of my invention, among others, is to provide a machine of thisclass, that shall be simple in construction and particularly efficientin operation.

One form of machine embodying my invention, and in the construction anduse of I which the objects herein set out, as well as others, may beattained, is illustrated in the accompanying drawings, in which Figure 1is a top plan view of a device embodying my invention, with partsremoved to show construction. Fig. 2 is a view in vertical sectionthrough the same on plane denoted by dotted line 22 of Fig. 1. Fig. 8 isa view in vertical section through the device on plane denoted by dottedline 33 of Fig. 1. Fig. 4 is a fragmentaryview in cross section throughthe shaving tools.

My invention relates particularly to the machine forming the subjectmatter of my co-pending application of Serial Number 670,200,filed'January 9th, 1912, one object of thepresent invention being toparticularly increase the efiiciency of the machine shown in the priorapplication.

In the accompanying drawings the numeral 6 denotes a block or cutterholder, of any suitable form and'material, with a recess 7 extendingdownwardly from the top fora short distance. In the preferred form ofconstruction, and as shown herein, the block includes a sleeve 8 closelyfitting its main part, which is preferably round, said sleeve extendingabove this main part a distance sutlicient to provide the recess of therequired depth. The base 9 of the block may be provided with holes orother suitable means for securing it to a bench or other structure. Awell 10 extends from the bot tom of the recess downwardly into theblock, for a suitable distance, and a central opening 11 and reliefopenings 12 extend from the bottom of the well through the block to thebottom thereof, the surface between the openings 12 constituting restsfor finishing cutter blades 13 located in cutter slots 14 formed inSpecification of Letters Patent. Patented Jan. 12, 1915.

the block in the direction of depth and mdi ally thereof, and extendingfrom the outer edge of the main part of the block into the well. Theends of the blades 13 projecting into the well 10 comprise cuttingsurfaces, the side of each blade being beveled as at 15, which beveledpart extends from the top at one side downwardly to the opposite side,terminating preferably at a distance from the bottom of the blade. Thisbeveled side forms a cutting edge 16. at the end, which edge isdiagonally disposed to the direction of movement of a nut, whichmovement is in a direction axially of the well 10. The ridge or apex 17of this cutting edge is located at one side of the blade so that it willnot come in contact with the nut in the cutting operation, said nutfirst encountering the beveled edge that exerts a shearing cut as thenut is forced downward. Each of the blades is cut away as at 18, withinwhich cut-away portion the lower part of the end of an adjacent blade'islocated, as shown in Fig. 3 of the drawing.

A spacer 19 rests upon the beveled surface of each blade with aretaining lip 20 on each I 23 terminating in ridges or apexes 24preferably located in the path of movement of the'nut as it is forceddownwardly in the cutting operation. The longer beveled sides 22terminate at vertical sides 25, which vertical sides rest against thesides of the cutter slots 14;. Clamps 26 extend over the apexes 24, thebases 27 of the clamps being secured, as by means of bolts, to thebottom surfaces of the recess 7, the front edges of the clamps being setback from the'cutting edges of the cutter blades. The roughing cutters21 are,'in fact, sizers, that is, they cut all of the nuts to preferablyuniform size before they are presented to the finishing' cutting blades13, and theses roughing cutters also have the function of gages orguides to direct the movement of a nut in its downward course, andtohold it steadily during the cutting operation. ings 12 serve asclearance openings to relieve The openthe well of chips and other dirtthat would otherwise obstruct the cutting operation. The cutter bladesare backed up by adjusting screws 28 that serve as a meansfor adjustingthe position of the cutters relatively each to the other.

While I have shown and described herein a satisfactory construction ofmy improved device, it will be understood that this may be departed fromto a greater or lesser degree and yet be'within the spirit and intent ofthe invention.

In many instances the amount of metal taken from the nut by thefinishing cutting blades will be very slight, the ends of the finishingcutting blades being set a slight distance nearer the center of theholder than are the cutting ends of the sizers, and this may be soslight as not to be perceptible in the drawings although it will beunderstood that the drawings do show the ends of the finishing cuttingblades slightly in advance of those of the sizers.

I claim 1. A holder, cutter blades angularly disposed in said holder andconverging toward a common center, the ends of the blades constitutingthe cutting portion that are beveled laterally and that are disposed forthe passage of an article to be shaved, sizers supported by the beveledsides of said outter blades and with their cutting ends arrangedslightly back of the cutting ends or" the cutter blades, and means forholding the sizers in place.

2. A holder, cutter blades angularly disposed in said holder andconverging toward a common center, the sides of the bades being beveledlaterally to provide a shearing cutting edge at the end of each cuttingblade, spacers supported upon the beveled sides of the blades, sizerssupported upon said spacers with their cutting ends slightly back of thecutting ends of the blades, and means for holding the sizers in place. yl

3. A holder, cutter blades angularly disposed in said holder andconverging toward a common center, the sides of the blades being beveledto form a shearing cutting end with an apex located at one side of theblade, sizers supported by said blades and having beveled sides formingan apex located in a vertical line between the edges of the cutterblades, and means for holding the sizers in place.

4-. A holder having radial grooves, cutter blades disposed in saidgrooves and having sides beveled laterally of the blade, said sidesextending below the upper edge of the grooves, sizers supported abovethe cutter blades within said grooves, said sizers having straight sidesresting against the Sides of the grooves and also beveled sidesconstituting cutting ends with shearing edges, and means for holding thesizers in place.

5. A holder having radial grooves, cutter blades located within saidgrooves and having beveled portions extending from one side to theopposite side oi each blade iornr ing a cutting end with a shearing edgeon each blade, and the beveled part of each blade being'located belowthe upper edges of said grooves, sizers supported above the cutterblades and having straight sides resting against the sides of saidgrooves and with a beveled upper edge providing a point located in avertical line between the sides of the cutter blades, and means forholding the sizers in place.

6. A holder having radial grooves, cutter blades located in said groovesand having the sides beveled laterally forming a cutting end having ashearing edge, spacers located above the beveled surface of said blades,sizers resting upon said spacers and having beveled sides providing endswith shearing edges, and clamps having lips overlying the points on thesizers, the bases of the clamps being secured against the horizontalsurface of the holder to clamp the blades and sizers in place.

GEORGE DUNHAlMi'.

Witnesses ARTHUR B. JENKINs, A. E. OBRIEN.

Gopies of this patent maybe obtained for, five cents each, by addressingthe Commissioner of lie/tents Washington, D. C.

